[INFO] cloning repository https://github.com/junhuang-ho/rust-syntax-basics-refresher
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/junhuang-ho/rust-syntax-basics-refresher" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjunhuang-ho%2Frust-syntax-basics-refresher", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjunhuang-ho%2Frust-syntax-basics-refresher'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10de361479ba4a95021ca34c0f8dbc50163862f0
[INFO] building junhuang-ho/rust-syntax-basics-refresher against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjunhuang-ho%2Frust-syntax-basics-refresher" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/junhuang-ho/rust-syntax-basics-refresher on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/junhuang-ho/rust-syntax-basics-refresher
[INFO] finished tweaking git repo https://github.com/junhuang-ho/rust-syntax-basics-refresher
[INFO] tweaked toml for git repo https://github.com/junhuang-ho/rust-syntax-basics-refresher written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/junhuang-ho/rust-syntax-basics-refresher already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 928d56595c3c1490186401951e4c3767861ec059bdff2ee4facab57f41f2db8d
[INFO] running `Command { std: "docker" "start" "-a" "928d56595c3c1490186401951e4c3767861ec059bdff2ee4facab57f41f2db8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "928d56595c3c1490186401951e4c3767861ec059bdff2ee4facab57f41f2db8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "928d56595c3c1490186401951e4c3767861ec059bdff2ee4facab57f41f2db8d", kill_on_drop: false }`
[INFO] [stdout] 928d56595c3c1490186401951e4c3767861ec059bdff2ee4facab57f41f2db8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e004baa8f1f9db951d745e183f4dbd7b45c8ef3474f7451311fd1e7e6bfc031
[INFO] running `Command { std: "docker" "start" "-a" "9e004baa8f1f9db951d745e183f4dbd7b45c8ef3474f7451311fd1e7e6bfc031", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling test1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rec`
[INFO] [stdout]    --> src/structs.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let rec = Rectangle {
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_rec`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `length` and `height` are never read
[INFO] [stdout]   --> src/structs.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Rectangle<T, U> {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 45 |     length: T,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 46 |     height: U,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `width` is never read
[INFO] [stdout]   --> src/structs.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Circle {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 60 |     length: f32,
[INFO] [stdout] 61 |     width: f32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `dough` and `cheese` are never read
[INFO] [stdout]   --> src/restaurant/mod.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub struct Pizza {
[INFO] [stdout]    |                ----- fields in this struct
[INFO] [stdout] 13 |         pub dough: String,
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout] 14 |         pub cheese: String,
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.56s
[INFO] running `Command { std: "docker" "inspect" "9e004baa8f1f9db951d745e183f4dbd7b45c8ef3474f7451311fd1e7e6bfc031", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e004baa8f1f9db951d745e183f4dbd7b45c8ef3474f7451311fd1e7e6bfc031", kill_on_drop: false }`
[INFO] [stdout] 9e004baa8f1f9db951d745e183f4dbd7b45c8ef3474f7451311fd1e7e6bfc031
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06908eeecabb218ff80a38ed0319927105da50b4ddc74a577646e26c8897ef70
[INFO] running `Command { std: "docker" "start" "-a" "06908eeecabb218ff80a38ed0319927105da50b4ddc74a577646e26c8897ef70", kill_on_drop: false }`
[INFO] [stderr]    Compiling test1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rec`
[INFO] [stdout]    --> src/structs.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let rec = Rectangle {
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_rec`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `length` and `height` are never read
[INFO] [stdout]   --> src/structs.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Rectangle<T, U> {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 45 |     length: T,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 46 |     height: U,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `width` is never read
[INFO] [stdout]   --> src/structs.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Circle {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 60 |     length: f32,
[INFO] [stdout] 61 |     width: f32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `dough` and `cheese` are never read
[INFO] [stdout]   --> src/restaurant/mod.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub struct Pizza {
[INFO] [stdout]    |                ----- fields in this struct
[INFO] [stdout] 13 |         pub dough: String,
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout] 14 |         pub cheese: String,
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "06908eeecabb218ff80a38ed0319927105da50b4ddc74a577646e26c8897ef70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06908eeecabb218ff80a38ed0319927105da50b4ddc74a577646e26c8897ef70", kill_on_drop: false }`
[INFO] [stdout] 06908eeecabb218ff80a38ed0319927105da50b4ddc74a577646e26c8897ef70